Take-up hook for embroidering-machines.



PATENTBD JAN. 31, 1905.

C. A. GONZENBACH.

TAKE-UP HOOK FOR BMBROIDERING MACHINES.

APPLICATION FILED 00123 1903. RENEWED JUNE 18, 1904.

A TTORNE YS,

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WITNESSES:

UNITED STATES Patented January 31, 1905.

ATENT OEEICE.

TAKE-UP HOOK FOR EMBROlDERlNG-IVIACHINES.

SPECIFICATION forming part of Letters Patent No. 781,598, dated January 31, 1905.

Application filed October 23, 1903. Renewed June 18, 1904. Serial No. 213,174.

To all Ii /1.0m it may concern:

ie it known that 1, CHARLES A. Goxznxmen. a citizen of the United States, residing in New York, borough of Kings, and State of NewYork, have invented certain new and useful Improvements in Take-Up Hooks for Embroidering-hlachines, of which the following is a specification.

This invention relates to certain improvements in the take-up hooks used in embroidering-machines of that class in which the neodles are thrust through the fabric from one side to the other, each needle being supplied with a thread of detinite length and the fabric shifted from side to side or up and down, as the case may be, to determine the length and direction of the successive stitches; and the invention relates more specifically to takeup hooks by which the slack of the threads between the needles and fabric is taken up at either side of the cloth, said take-up hooks being so constructed as to yield to the tension exerted on the same by the threads and to permit the threads to slip off reliably from the hooks at the proper time.

For this purpose the invention consists of a take-up hook for embroidcring-machincs which comprises a shank bent up from wire, a hook provided with a downwardly-directed point made integral therewith, a sheet-metal liap pivoted to a rod or pintle located midway of the legs of the shank, said sheet metal flap extending over the pointot' the adjacent hook and being acted upon by the tension of a helical spring placed on said pintle so as to exert a certain pressure thereon and permit the escape of the thread from the hook when the latter arrives at the end of its ascending motion, as will be fully described hereinafter and linally pointed out in the claims.

in the accompanying drawingsl igure 1 represents a side elevation of a number of my improved take-up hooks shown as attached to the supporting hook-bar of a Swiss or other embroidering-machine. Fig. 2 is a side elevation ofone of theimproved hooks. Fig. 3 is a plan view of Fig. 1, and Figs. t, 5, 6, and T are diagrams showing the successive positions of the take-up hooks relatively to the loops of the fabric to be embroidered.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, A represents the supporting-bar for the take-up hooks, and B B are the take-up hooks, the shanks of which are attached by washers and clam ping-screws c to the bar A, as shown clearly in Figs. 1 and 2. The lower ends I; 7) of the shanks are bent at an obtuse angle to the upper part of the shanks, so as to be attached conveniently to the supporting-bar A, as shown in Fig. 2.

Each take-up hook B is made from an integral piece of wire and provided with a shank formed of two parallel legs 11 b, which are connected at their upper ends by a roundedoti portion 6', that is bent laterally and in downward direction, so as to form a tapering point 7), as shown in Fig. l. A wire rod (/is arranged midway between the legs I) of the shank, at its upper end terminating close to the rounded-off portion 6 of the hook, while the lower end of the wire rod (Z is set off toward one of the legs 6, so as to abut against said leg, it being rigidly held in position thereon either by soldering or by making it in one piece with the opposite leg I) and bending it in ugward direction from the lower transverse end of the shank. To the upperend of the wire rod 1/ is hinged a sheet-metal flap c, which extends over the left-hand end of the rounded-off portion 6" of the take-up hook and which is supported at its lower end by the upper-end of a helicalspringc and pressed by the same into contact with the rounded-off portion U". The helical spring 0 is placed on the wire rod (1 and supported at its lower end on the offsetorshoulder of thesame, thelower end of the spring w being bent around one of the legs 6, as shown in Fig. .1. The sheetmetal flap (1 is made straight at its hinge connection with the wire rod or pintle (I, but rounded off at its opposite side, and of such a size as to overlap the tapering point 0 of the next adjacent take-up hook B. The pressure on the sheet-metal flap c on the point 1) corresponds to the tension of the helical spring c acting on the same, the lower part of the flap being in line with the lower part of the hook-point b", so that the needle-thread passes on to the lower tapering portion of the point.

The tapering point 6 is slightly bent in back ward direction at its lower end or terminal, as shown clearly in Fig. 2, so as to facilitate the passing of the loop-thread at the proper time between the point 6" and the overlapping portion of the flap of the next adjacent takeup hook.

The take-up hooks B are attached to the hook-bar A at intervals corresponding with the intervals between the needles a and grippers g, the hook-bars being guided in the well-known manner, so as to move up and down and cause the engagements of the needle-threads by the points of the hooks for taking up the slack of the same. When the hooks stand normally in line with their respective grippers. they engage the needlethreads by the points and take up the slack of the threads by the downward motion, the loops formed by the threads being taken up alternately at opposite sides of the fabric by the ascending and descending motion of the take-up hooks at opposite sides of the fabrics, as shown, respectively, in Figs. &and 5. The passing off of the needle-threads from the points of the hooks is prevented until the hooks ascend again intoa position inline with the grippers, when the threads pass over the lower tapering portions of the points and below the flaps without breaking or otherwise injuring the same. When the needles are passed through the fabric and are clamped by the grippers at one side of the fabric, the take-up hooks on the same side of the fabric are then in their uppermost positions, as shown in Fig. 4, and the hooks take up the slack of the needle-threads and draw the loops over from the opposite side and bring them down, the threads being released from the ascending hooks at the opposite side of the fabric in the manner before described, so that the stitches are thereby formed on the fabric by the reliable and effective alternating action of the take-up hooks on the needle-threads at opposite sides of the fabric.

As the hooks are bent up from one piece of stout wire, they are strong and durable and yet cheaper than the sheet-metal hooks heretofore employed. The spring-actuated sheetmetal flaps applied to the hooks form a safety device for preventing the slipping off of the needle-thread as long as a tension is required to be exerted on the same, but permit the free slipping off of the looped threads between the tapering points and the flaps when the necessity for retaining them has passed. The improved take-up hooks form thereby an important means for taking up the slack of the needle-threads and holding them at the proper tension for the correct formation of the stitches and the reliable slipping off of the threads without injury to the same at the proper time when the hooks arrive at the ends of their ascending motion.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. A take-up hook for embroidering-machines, consisting of a shank provided with a rounded-off upper portion and a downwardlyextending tapering point, and a spring-actuated sheet-metal flap hinged to the upper portion of the shank and extended sidewise over the rounded-off portion, and adapted to engage the adjacent hook and serve as a threadtension therefor, substantially as set forth.

2. A take-up hook for embroidering-rnachines, consisting of a shank formed of parallel legs, a rounded-off upper portion and a tapering point, extending downwardly from the upper portion, and a spring-actuated sheetmetal flap hinged to a rod or pintle supported between the legs of the shank, and adapted to engage the adjacent hook and serve as a threadtension therefor, substantially as set forth.

3. A take-u p hook for embroidering-machines, consisting of a wire shank formed of parallel legs, a rounded-off upper portion and a downwardly-extending tapering point at one side of the same, a wire rod or pintle between the legs of said shank, and a spring-actuated sheet-metal flap hinged to the upper end of said pintle and extending over the roundedoff portion of the shank, and adapted to engage the adjacent hook and serve as a threadtension therefor, substantially as set forth.

4. A take-up hook for embroidering-machines, consisting of a wire shank formed of two parallel legs, an upper rounded-01f portion and a downwardly-extending tapering point, a wire rod or pintle supported midway between the legs of said shank, a sheet-metal flap hinged to the upper end of said rod or pintle, and adapted to overlap and serve as a thread-tension for the adjacent hook, and a helical spring on said pintle connected with the flap and supported on a shoulder or offset of the pintle, substantially as set forth.

5. A take-up hook for an embroidering-machine provided with a spring-actuated flap hinged thereto and adapted to engage an adjacent take-u p hook and serve as a thread-tension therefor.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

CHARLES A. GONZENBACH.

Witnesses:

PAUL GroEPEL, HENRY J. SUHRBIER. 

